Overall Dimensions â High School. High School Overall football field dimensions are as follows: Length: 360 feet or 120 yards. Width: 160 feet or 53 1/3 yards. End Zone: High School end zones are 10 yards deep. End Line: A six foot end line border marks the back of the end zone. Field Numbers: Sideline field numbers are 6 foot high by 4 foot wide designating each 10 yard line marker.
1 On average, dogs have two cycles a year. 2  The estrus cycle lasts on average 12-21 days, but maybe be as short as a few days to four weeks. 3  The estrus period length varies widely between breeds and individual dogs. 4  The length of a cycle varies widely, even for dogs of the same breed.
Female dogs don't have period, they go through a heat cycle, called estrus, every six months. She will have proestrus, or a bleeding cycle, before her true heat cycle during which she is very receptive to the advances of male dogs. This heat cycle lasts for several days up to three or four weeks.